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July 30, 2014

July 30, 2014

Posted by **Alonzo** on Thursday, March 11, 2010 at 1:47pm.

- Precalculus -
**FredR**, Thursday, March 11, 2010 at 8:09pmdistance = velocity x time or

time = distance / velocity

total time=d1/v1+d2/v2=2.5 hrs (1)

where d1 = car distance = 30 (2)

v1 = car speed

d2 = train distance = 120 - d1 (3)

v2 = train velocity = v1+20 (4)

combine (1), (2), (3), and (4) and solve for v1

- elementary -
**Anonymous**, Thursday, March 10, 2011 at 7:34pm300 and 200000

- Precalculus -
**laura**, Saturday, December 3, 2011 at 3:57pmidk can you show me how please

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